Font Tab (Legend)
The Description textbox lists the font type and font size being used by the legend text. The ellipsis button to the right of the textbox opens the font browser.
Chart3D.Legend.Font.Name
Chart3D.Legend.Font.Size
Chart3D.Legend.Font.Bold
Chart3D.Legend.Font.Italic
Chart3D.Legend.Font.Underline
Chart3D.Legend.Font.Strikethrough
Chart3D.Legend.Font.Weight
Chart3D.Legend.Font.Charset
For more information, see Choosing Fonts.